Update build.yml

.github/workflows/build.yml

@@ -8,10 +8,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v1
-    - name: set up JDK 1.8
-      uses: actions/setup-java@v1
+    - uses: actions/checkout@v2
+    - name: set up JDK 1.11
+      uses: actions/setup-java@v2
       with:
-        java-version: 1.8
+        distribution: 'adopt'
+        java-version: '11'
     - name: Build with Gradle
       run: ./gradlew assembleDebug